Hi David,
I have replied direct as well since the list sometimes bounces me.
I tend to solve this problem using a kernel worker thread and one or
more message queues.
The interrupt and the user task can all send requests to the message
queue which wakes up the thread to process each request in turn.
In this way you can be sure that you have complete control over the
device without being concerned over interrupts etc.
The only drawback is possible increased latency for interrupt processing.
You can have one queue for interrupts and one for user tasks and give
priority to servicing the interrupt requests first.
You will still have to complete the user service request before you get
to the interrupt.
So provided that you can stand the possible delay in servicing the
interrupt "bottom half" the thread solution may work for you.
Good luck. Please ask if you have more questions
Regards
Phil Wilshire
David Wooff wrote:
Hello,
I have a "bottom half" processing function which I'm queueing from an
interrupt on a workqueue. Is it OK/safe to also queue the same
function on the same workqueue from the driver in response to an
application read/write? I have read LDD3 and looked for workqueues in
the documentation and consulted various other sources but I can't
figure out if this is safe by design (without trying it obviously).
Sorry for the legal stuff btw (no way to get it removed so far).
Regards,
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